41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
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#define MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
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#include <stdint.h>
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#include <stdio.h>
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namespace webrtc {
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namespace vp8 {
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typedef struct VP8BitReader VP8BitReader;
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struct VP8BitReader {
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// Boolean decoder.
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uint32_t value_; // Current value (2 bytes).
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uint32_t range_; // Current range (always in [128..255] interval).
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int bits_; // Number of bits shifted out of value, at most 7.
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// Read buffer.
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const uint8_t* buf_; // Next byte to be read.
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const uint8_t* buf_end_; // End of read buffer.
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};
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// Gets the QP, QP range: [0, 127].
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// Returns true on success, false otherwise.
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bool GetQp(const uint8_t* buf, size_t length, int* qp);
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} // namespace vp8
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_UTILITY_VP8_HEADER_PARSER_H_
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